Malicious PDF — malware analysis report

Static analysis result for SHA-256 57528df4f9e53bd6…

MALICIOUS

PDF

53.4 KB Created: 2020-08-18 14:20:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 5ce400d3e62753730831abe0a1b1fca5 SHA-1: cc60fd2d0d763176c3082ea584710565c3de1c7c SHA-256: 57528df4f9e53bd62bb8d5098d07ae06a8afcc794041b888b7811d78f6024409
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a significant number of embedded links, with one heuristic specifically identifying it as a 'PDF SEO Link Farm'. The primary malicious URL, 'https://ttraff.ru/pify?keyword=azar+hack+apk+gems', is flagged as a known malicious redirector. This suggests the document's purpose is to lure users into clicking these links, which then redirect to malicious infrastructure. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.ru/pify?keyword=azar+hack+apk+gems In PDF document text
    • http://files.citrix.mmac.org/uploads/1/3/1/8/131857479/wevukefipaxige_ginamupefinu_jedon_tavaji.pdfIn PDF document text
    • http://batasog.healmylifemobile.com/uploads/1/3/0/8/130874493/c90a61dac9e6c7a.pdfIn PDF document text
    • http://vumapewo.daphnemeesters.com/uploads/1/3/0/9/130969502/9d4d891892c5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9340/2524/files/jesamadam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3108/4708/files/36294182858.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5103/1447/files/90616009106.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0921/0529/files/digital_principles_and_design_givone.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4188/2265/files/gotarisavolanevivuxonaji.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6638/3768/files/cetoconazol_shampoo_medley_bula.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1139/0115/files/21391586991.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6597/4690/files/academic_english_skills_for_success.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8379/2545/files/what_is_the_plural_of_crisis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8062/0963/files/61617235755.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off0000a0fb.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xA0FB 22780 bytes
SHA-256: 1f568480ff2f16072b63b803bcafcd6cb57bf251973ab04adc00d0a1b1e7322c
font_00_sfnt_off00006be5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BE5 5420 bytes
SHA-256: 000f467bc54b78dfc18d358ad708b69e2842741d3818027e5796a0dc87c8e6f5
font_01_sfnt_off00007e3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E3B 10060 bytes
SHA-256: 1407e452ac724fc0d72ba0242810c2ee0294d6f4c724d426990283623b330c35